36 lines
1.2 KiB
Plaintext
36 lines
1.2 KiB
Plaintext
From: Theodore Ts'o <tytso@mit.edu>
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Date: Sun, 13 Jul 2008 23:03:59 +0000 (-0400)
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Subject: libext2fs: Don't check the group checksum when !GDT_CSUM
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X-Git-Url: http://git.kernel.org/?p=fs%2Fext2%2Fe2fsprogs.git;a=commitdiff_plain;h=4729455f0a68f2fa0a83ec8460d1d4bccba9dcfa
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libext2fs: Don't check the group checksum when !GDT_CSUM
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ext2fs_group_desc_csum_verify() is always checking the bg_checksum (to
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make sure it is zero) even when the GDT_CSUM feature is not present.
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This is normally OK, but apparently there are filesystems in the wild
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where this field has not be initialized to zero.
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Addresses-Debian-Bug: #490637
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Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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---
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diff --git a/lib/ext2fs/csum.c b/lib/ext2fs/csum.c
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index ce1508e..6a49d8f 100644
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--- a/lib/ext2fs/csum.c
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+++ b/lib/ext2fs/csum.c
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@@ -60,8 +60,10 @@ STATIC __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group)
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int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group)
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{
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- if (fs->group_desc[group].bg_checksum !=
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- ext2fs_group_desc_csum(fs, group))
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+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
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+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM) &&
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+ (fs->group_desc[group].bg_checksum !=
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+ ext2fs_group_desc_csum(fs, group)))
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return 0;
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return 1;
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